The effect of shifting calf-weaning age on profiles of energy status (BW, BCS, and rib and rump fat) and reproductive performance of beef cows was evaluated in a 3-yr study. Pregnant and lactating crossbred beef cows (n = 408), mainly of Angus and Hereford breeding, were stratified by age and by sex and BW of their calves and assigned randomly into 2 treatments: weaning at approximately 180 d (...

OBJECTIVE It was the aim of this study to examine the possible effects of maternal and fetal characteristics on the fetal fraction in maternal plasma cell-free DNA (cfDNA) at 11-13 weeks' gestation. METHODS In a nested case-control study, cfDNA was extracted from maternal plasma obtained before chorionic villous sampling from 300 euploid, 50 trisomy 21 and 50 trisomy 18 pregnancies at 11-13 w...

Observations were made on 79 Nigerian indigenous (NI) and 24 Large White pigs.There was. a, three-month delay, in growth acceleration NI pigs as compared with LW pigs. Growth started at 7 4 months for respectively. Over all ages studied, differed markedly from live weight, body length, height, depth ham dimen­sions but this difference was much less between males than females_ In ;boars serially...

OBJECTIVE Increased care of fetal and neonatal airways has led to advances in neonatal medicine. The early diagnosis and treatment of respiratory diseases require a detailed knowledge of fetal airway anatomy and development. The aim of this study was to determine the anatomical development of the thyroid and cricoid cartilages and their structural variability during fetal life. MATERIAL AND M...

We investigated the developmental toxicity in mice of a common commercial formulation of herbicide containing a mixture of 2,4-dichlorophenoxyacetic acid (2,4-D), mecoprop, dicamba, and inactive ingredients. Pregnant mice were exposed to one of four different doses of the herbicide mixture diluted in their drinking water, either during preimplantation and organogenesis or only during organogene...

The aim of this study is to assess the association between crown-rump length (CRL) measured before the 10th gestational week and birth weight. Results from 316 transvaginal ultrasonography scans at the 46th, 53rd, 60th, 67th, and 74th days of pregnancy were compared in low birth weight (LBW) versus normal birth weight groups. A positive correlation between CRL and birth weight was observed when...

A meta-analysis was performed to study the relationship between ovine fetal BW and body length during the last month of pregnancy in sheep gestated under normal conditions and under different natural and experimental maternal- placental- and fetal- directed constraints. Means of crown-rump length (CRL) and BW records, as well as means of calculated G index (GI, BW/CRL1.5), body mass index (BMI,...

Aims: This study was carried out to investigate the carcass characteristics of male and female rabbits raised in semi-arid condition.Methods Results: Twenty-four (24) rabbits, comprising 12 bucks does, were used for this study. At weeks age, weighed slaughtered. Parameters measured include; pre-slaughter weight (kg), hot (g), four primal cut weights (shoulder, ribs, loin rump), internal organs ...

AIMS The aim of this study was to assess the feasibility and accuracy of fetal gender assignment by transabdominal ultrasound at 12-14 weeks of gestation. METHODS Fetal gender assessment was performed in 1222 singleton pregnancies. In all fetuses the crown-rump length (CRL) was measured and the genital area of the fetus was examined in the mid-sagittal plane. The result of ultrasound examinat...

STUDY QUESTION How do human embryonic growth trajectories evolve in the first trimester, and is first-trimester embryonic growth associated with fetal growth and birthweight (BW)? SUMMARY ANSWER Human embryonic growth rates increase between 9 and 10 weeks of gestation and are associated with mid-pregnancy fetal growth and BW. WHAT IS KNOWN ALREADY Fetal growth is associated with health and ...